Roll src/third_party/skia 9a7c7be15969..b5d8c634f95b (11 commits) (#8513)

https://skia.googlesource.com/skia.git/%2Blog/9a7c7be15969..b5d8c634f95b

git log 9a7c7be15969e1e0bad0b7a5c6bb40e254265838..b5d8c634f95b008882710cb27b6094b3f69d1a85 --date=short --no-merges --format=%ad %ae %s
2019-04-08 reed@google.com remove guard for bitmap shader api
2019-04-09 bsalomon@google.com Add support for importing GL_R16F for YUVA promise images
2019-04-04 martin@mainframe.co.uk add missing shared lib visibility macros
2019-04-09 herb@google.com Revert "Handle translating blob to origin in bulk"
2019-04-09 herb@google.com Revert "Reland "Do not use sub-pixel positioning for source space""
2019-04-09 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms 36eeb1311a72..0da672fc2c69 (1 commits)
2019-04-09 herb@google.com Reland "Add maxDimension() to glyph"
2019-04-09 herb@google.com Reland "Do not use sub-pixel positioning for source space"
2019-04-08 brianosman@google.com Shader serialization experiment (with Mali Offline Compiler analysis)
2019-04-09 reed@google.com Revert "Do not use sub-pixel positioning for source space"
2019-04-09 reed@google.com Revert "Add maxDimension() to glyph"

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (egdaniel@google.com), and stop
the roller if necessary.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '9a7c7be15969e1e0bad0b7a5c6bb40e254265838',
+  'skia_revision': 'b5d8c634f95b008882710cb27b6094b3f69d1a85',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

-Signature: 979e49fe2ee55f481c36973e18987679
+Signature: c209a0ed9657c1f2ec1912be3288138e
 
 UNUSED LICENSES: